Fish collecting system of aquaculture net cage

Abstract

The utility model provides an aquaculture net cage fish collecting system which comprises a truss module and a net cage module, the truss module comprises a truss platform and a plurality of supporting rods arranged below the truss platform, the net cage module comprises a plurality of aquaculture net cages, the aquaculture net cages are arranged between the adjacent supporting rods, and the aquaculture net cages are in sliding connection with the supporting rods. The truss platform is provided with a vacuum fish suction pump and a lifting device used for lifting the aquaculture net cage, and the bottom of the aquaculture net cage is provided with a protruding structure. The aquaculture net cage is lifted through the lifting device, so that the fishery catch of the aquaculture net cage can be sucked by the vacuum fish suction pump, meanwhile, the fishery catch can be gathered in the edge area of the bottom of the aquaculture net cage through the protruding structure at the bottom of the aquaculture net cage, the vacuum fish suction pump can completely catch the fishery catch in the edge area, and compared with a traditional fish suction mode, the fish suction efficiency is improved. The embodiment of the utility model can effectively improve the fishing rate of fishing, and can be widely applied to the technical field of culture.

Description

TECHNICAL FIELD

[0001] The utility model relates to but are not limited to the aquaculture technical field, especially to a kind of aquaculture net cage fish collection system. BACKGROUND

[0002] The current truss type aquaculture platform net cage bottom structure generally adopts the flat pattern of field type or well type, and the net clothes in each unit cell will form multiple net bags due to gravity, and fish will drill into the net bag during the fishing process due to stress, resulting in incomplete fishing process and low fishing rate. UTILITY MODEL CONTENT

[0003] The following is a summary of the subject matter described in detail in this paper. This summary is not intended to limit the scope of protection of the claims.

[0004] The main purpose of the embodiment of the utility model is to provide an aquaculture net cage fish collection system, which can effectively improve the fishing rate of fishery.

[0005] In the first aspect, the utility model embodiment provides an aquaculture net cage fish collection system, which comprises a truss module and a net cage module, the truss module comprises a truss platform and a plurality of support rods arranged under the truss platform, the net cage module comprises a plurality of aquaculture net cages, the aquaculture net cages are arranged between adjacent support rods, the aquaculture net cages are in sliding connection with the support rods, the truss platform is provided with a vacuum fish suction pump and a lifting device for lifting the aquaculture net cages, and the bottom of the aquaculture net cage is provided with a convex structure.

[0006] In some optional embodiments, the lifting device comprises a lifting mechanism and a sliding mechanism, the lifting mechanism comprises a first rotating motor, a first winding and unwinding wheel, a first rope, a second rotating motor, a second winding and unwinding wheel and a second rope, the sliding mechanism comprises a fixed pulley and a third rope, the first net cage and the second net cage are connected through the third rope, the third rope passes through the fixed pulley, and the first net cage and the second net cage represent two adjacent aquaculture net cages.

[0007] In some optional embodiments, the bottom of the first net cage is provided with a first protrusion, and the bottom of the second net cage is provided with a second protrusion. Both the first and second protrusions represent the protrusion structure. The first protrusion includes a first telescopic frame, a second telescopic frame, and a third telescopic frame. The first telescopic frame is fixedly connected to the bottom of the first net cage, the second telescopic frame is slidably connected to the inner wall of the first telescopic frame, and the third telescopic frame is slidably connected to the inner wall of the second telescopic frame. The second protrusion includes a fourth telescopic frame, a fifth telescopic frame, and a sixth telescopic frame. The fourth telescopic frame is fixedly connected to the bottom of the second net cage, the fifth telescopic frame is slidably connected to the inner wall of the fourth telescopic frame, and the sixth telescopic frame is slidably connected to the inner wall of the fifth telescopic frame. The first end of the third rope is fixedly connected to the third telescopic frame, and the second end of the third rope is fixedly connected to the sixth telescopic frame.

[0008] In some alternative embodiments, the first telescopic frame is provided with a first latching component for locking the second telescopic frame and the third telescopic frame, and the fourth telescopic frame is provided with a second latching component for locking the fifth telescopic frame and the sixth telescopic frame.

[0009] In some alternative embodiments, a fish-attracting light is provided on the support rod, and the fish-attracting light is located at the center of a first position on the support rod.

[0010] In some optional embodiments, the vacuum fish pump includes a fish collecting cylinder and a vacuum pump, the vacuum pump being connected to the fish collecting cylinder, the first end of the fish collecting cylinder being connected to the aquaculture cage via a fish suction pipe, and the second end of the fish collecting cylinder being connected to a collection device via a fish outlet pipe.

[0011] In some optional embodiments, a support mechanism is provided inside the fish collecting tube, and a filter mechanism is provided on the support mechanism. The filter mechanism is located between the inlet side and the outlet side of the fish collecting tube. The inlet side of the fish collecting tube is connected to the fish suction pipe, and the outlet side of the fish collecting tube is connected to the fish outlet pipe.

[0012] In some optional embodiments, a first electromagnetic transceiver is provided inside the fish outlet pipe, and the filtration mechanism includes a first filter screen and a second filter screen. The first filter screen is disposed above the second filter screen, and the second filter screen is moved by a stepper motor.

[0013] In some optional embodiments, the first filter screen includes a plurality of uniformly arranged first filter plates and first filter holes, and the gaps between adjacent plurality of first filter plates form the first filter holes; the second filter screen includes a plurality of uniformly arranged second filter plates and second filter holes, and the gaps between adjacent plurality of second filter plates form the second filter holes.

[0014] In some alternative embodiments, the area of ​​the first filter hole is equal to the area of ​​the first filter plate, and the area of ​​the second filter hole is equal to the area of ​​the second filter plate.

[0015] The beneficial effects of this utility model include: The fish harvesting system for aquaculture cages provided by this utility model includes a truss module and a cage module. The truss module includes a truss platform and multiple support rods set under the truss platform. The cage module includes multiple aquaculture cages, which are arranged between adjacent support rods and slidably connected to the support rods. The truss platform is equipped with a vacuum fish-suction pump and a lifting device for raising and lowering the aquaculture cages. The bottom of the aquaculture cages has a raised structure. By raising and lowering the aquaculture cages through the lifting device, the catch in the aquaculture cages can be sucked up by the vacuum fish-suction pump. At the same time, the raised structure at the bottom of the aquaculture cages can gather the catch in the edge area of ​​the bottom of the aquaculture cages, so that the vacuum fish-suction pump can catch all the catch in the edge area. Compared with the traditional fish-suction method, this embodiment can effectively improve the catch rate.

[0016] Other features and advantages of this invention will be set forth in the description which follows, and will be apparent in part from the description, or may be learned by practicing the invention. The objects and other advantages of this invention may be realized and obtained by means of the structures particularly pointed out in the description, claims, and drawings. Attached Figure Description

[0017] Figure 1 This is a schematic diagram of a fish harvesting system for aquaculture cages provided in one embodiment of this utility model;

[0018] Figure 2 This is a schematic diagram of the structure of a vacuum fish pump provided in one embodiment of the present invention;

[0019] Figure 3 This is a schematic diagram of a support mechanism and a filtering mechanism provided in one embodiment of the present invention;

[0020] Figure 4 This is a schematic diagram showing that the overlap between the first filter plate and the second filter plate is zero, according to one embodiment of the present invention.

[0021] Figure 5 This is a schematic diagram showing that the overlap between the first filter plate and the second filter plate is 50% according to one embodiment of the present invention.

[0022] Figure 6 This is a schematic diagram showing that the first filter plate and the second filter plate provided in one embodiment of the present invention have a 100% overlap.

[0023] Figure label:

[0024] Truss platform 100, support rod 110, first take-up and release wheel 120, first rope 121, fixed pulley 130, third rope 131, second take-up and release wheel 140, second rope 141, fish attracting light 150;

[0025] Fish collecting tube 200, fish suction pipe 210, first valve 211, fish outlet pipe 220, second valve 221, air suction pipe 230, third valve 231, discharge pipe 240, fourth valve 241, first support rod 250, second support rod 251, vacuum pump 260, base plate 270, support mechanism 280, first support 281, second support 282, filtration mechanism 290, first filter plate 291, second filter plate 292;

[0026] First cage 300, first telescopic frame 310, second telescopic frame 320, third telescopic frame 330, second cage 340, pulley 350, fourth telescopic frame 360. Detailed Implementation

[0027] To make the objectives, technical solutions, and advantages of this utility model clearer, the present utility model will be further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain this utility model and are not intended to limit this utility model.

[0028] It should be noted that although functional modules are divided in the device schematic diagram and a logical order is shown in the flowchart, in some cases, the steps shown or described may be performed in a different order than the module division in the device or the order in the flowchart. The terms "first," "second," etc., in the specification, claims, or the aforementioned drawings are used to distinguish similar objects and are not necessarily used to describe a specific order or sequence.

[0029] Reference Figure 1 , Figure 1This is a schematic diagram of a fish harvesting system for aquaculture cages provided in one embodiment of the present invention. It includes a truss module and a cage module. The truss module includes a truss platform 100 and a plurality of support rods 110 disposed under the truss platform 100. The cage module includes a plurality of aquaculture cages, which are disposed between adjacent support rods 110. The aquaculture cages are slidably connected to the support rods 110. The truss platform 100 is provided with a vacuum fish suction pump and a lifting device for raising and lowering the aquaculture cages. The bottom of the aquaculture cages is provided with a raised structure.

[0030] Specifically, the lifting devices are installed on the truss platform 100. Multiple lifting devices can be installed, each corresponding to a different aquaculture cage, allowing for the individual lifting and lowering of different cages. Different cages can raise the same type of marine fish or different species; no specific limitation is made here. The lifting speed of the lifting devices is set according to the specific lifting power and requirements.

[0031] In some optional embodiments, the lifting device includes a lifting mechanism and a sliding mechanism. The lifting mechanism includes a first rotating motor, a first take-up and release wheel 120, a first rope 121, a second rotating motor, a second take-up and release wheel 140, and a second rope 141. The sliding mechanism includes a fixed pulley 130 and a third rope 131. The first net cage 300 and the second net cage 340 are connected by the third rope 131, which passes around the fixed pulley 130. The first net cage 300 and the second net cage 340 represent two adjacent aquaculture net cages.

[0032] Specifically, two adjacent aquaculture cages are connected to each other by a fixed pulley 130, and the length of the third rope 131 that passes around the fixed pulley 130 is fixed. It can alternately pull up the first protrusion of the first cage 300 and the second protrusion of the second cage 340. The third rope 131 is only connected to the first and second protrusions when harvesting, and is retracted during normal aquaculture. When the first cage 300 (the first cage 300 refers to one of the adjacent aquaculture cages, not a specific aquaculture cage; similarly, the second cage 340 refers to another of the adjacent aquaculture cages, not a specific aquaculture cage) is in the first position, and it is necessary to raise the first cage 300 to the second position for harvesting, the first rotating motor is controlled to rotate, which in turn rotates the first reel 120 synchronously, so that the first reel 120 winds up the first rope 121 and pulls the first cage 300 upward. The aquaculture net cage and support rod 110 are connected by pulleys 350. A corresponding slide rail is provided on the support rod 110, allowing the pulleys 350 to slide on the rail, thus facilitating the upward pulling of the first net cage 300 by the first rope 121. Multiple pulleys 350 are provided on the first net cage 300, the exact number is not limited, and pulleys 350 are provided on both sides of the first net cage 300 to reduce resistance during lifting. A third rope 131 is connected to the first protrusion and the second protrusion, respectively. After passing over the fixed pulley 130, the third rope 131 synchronously moves the first protrusion of the first net cage 300 and the second protrusion of the second net cage 340, causing the catch to gather at the bottom edge area of ​​the first net cage 300. Specifically, the first protrusion is pulled upward by the first end of the third rope 131 when the first net box 300 rises, the second protrusion is pulled upward by the second end of the third rope 131 when the second net box 340 rises, the first protrusion pulls downward by the first end of the third rope 131 when the first net box 300 falls, and the second protrusion pulls downward by the second end of the third rope 131 when the second net box 340 falls.

[0033] In some optional embodiments, the bottom of the first cage is provided with a first protrusion, and the bottom of the second cage is provided with a second protrusion. Both the first and second protrusions represent the protrusion structure. The first protrusion includes a first telescopic frame 310, a second telescopic frame 320, and a third telescopic frame 330. The first telescopic frame 310 is fixedly connected to the bottom of the first cage 300, the second telescopic frame 320 is slidably connected to the inner wall of the first telescopic frame 310, and the third telescopic frame 330 is slidably connected to the inner wall of the second telescopic frame 320. The second protrusion includes a first telescopic frame 310, a second telescopic frame 320, and a third telescopic frame 330. The system comprises four telescopic frames 360, a fifth telescopic frame, and a sixth telescopic frame. The fourth telescopic frame 360 ​​is fixedly connected to the bottom of the second net cage 340. The fifth telescopic frame is slidably connected to the inner wall of the fourth telescopic frame 360. The sixth telescopic frame is slidably connected to the inner wall of the fifth telescopic frame. The first end of the third rope 131 is fixedly connected to the third telescopic frame 330, and the second end of the third rope 131 is fixedly connected to the sixth telescopic frame. The first telescopic frame 310 is provided with a first buckle assembly, and the fourth telescopic frame 360 ​​is provided with a second buckle assembly.

[0034] Specifically, the first telescopic frame 310 is fixedly connected to the bottom of the first net cage 300. The second telescopic frame 320 is slidably connected to the inner wall of the first telescopic frame 310 through a first opening provided on the first telescopic frame 310, and the bottom diameter of the second telescopic frame 320 is larger than the first opening, or a protrusion is provided at the bottom of the second telescopic frame 320 to hold the first opening. The third telescopic frame 330 is slidably connected to the inner wall of the second telescopic frame 320 through a second opening provided on the second telescopic frame 320, and the bottom diameter of the third telescopic frame 330 is larger than the second opening, or a protrusion is provided at the bottom of the third telescopic frame 330 to hold the second opening. The fourth telescopic frame 360 ​​is fixedly connected to the bottom of the second net cage 340. The fifth telescopic frame is slidably connected to the inner wall of the fourth telescopic frame 360 ​​through a third opening provided on the fourth telescopic frame 360, and the bottom diameter of the fifth telescopic frame is larger than the third opening, or a protrusion is provided at the bottom of the fifth telescopic frame to hold the third opening. The sixth telescopic frame is slidably connected to the inner wall of the fifth telescopic frame through the fourth opening provided on the fifth telescopic frame, and the bottom diameter of the sixth telescopic frame is larger than the fourth opening, or the bottom of the sixth telescopic frame is provided with a protrusion to hold the fourth opening. The first end of the third rope 131 is fixedly connected to the third telescopic frame 330, and the second end of the third rope 131 is fixedly connected to the sixth telescopic frame. The first telescopic frame 310 is provided with a first buckle assembly. When the first net box 300 rises, the first buckle assembly is controlled to release the second telescopic frame 320 and the third telescopic frame 330. Specifically, the second telescopic frame 320 and the third telescopic frame 330 are provided with first buckle holes that overlap in position. The first buckle assembly includes a first buckle bolt and a first buckle motor. The first buckle motor drives the first buckle bolt to buckle into or out of the first buckle hole. The fourth telescopic frame 360 ​​is provided with a second buckle assembly. When the first net box 300 rises, the second buckle assembly is controlled to clamp the fourth telescopic frame 360 ​​and the fifth telescopic frame. Specifically, the fourth telescopic frame 360 ​​and the fifth telescopic frame are provided with second buckle holes that overlap in position. The second buckle assembly includes a second buckle bolt and a second buckle motor. The second buckle motor drives the second buckle bolt to buckle into or out of the second buckle hole. During the process of the first net cage 300 rising to the second position of the support rod 110 and the second net cage 340 descending to the first position of the support rod 110, the second end of the third rope 131 is pulled downward by the sixth telescopic frame, and the first end of the third rope 131 is pulled upward by the second telescopic frame 320 and the third telescopic frame 330, so that the third telescopic frame 330 reaches the top of the first net cage 300, thereby compressing the activity space of the fish, causing the fish to gather in the edge area and increasing the catch rate.

[0035] In some optional embodiments, a fish-attracting lamp 150 is provided on the support rod 110, and the fish-attracting lamp 150 is located at the center of a first position of the support rod 110.

[0036] Specifically, the fish-attracting light 150 is located in the center of the first position of the support rod 110, which can attract fish to the middle of the aquaculture cage and lure marine organisms such as fish and shrimp into the aquaculture cage, increasing the number of prey organisms for the fish in the aquaculture cage, thereby reducing the amount of feed to be put into the aquaculture cage during the aquaculture process, reducing the feed conversion ratio, and lowering the aquaculture cost.

[0037] In some optional embodiments, the vacuum fish suction pump includes a fish collection cylinder 200 and a vacuum pump 260, the vacuum pump 260 being connected to the fish collection cylinder 200, the first end of the fish collection cylinder 200 being connected to the aquaculture net cage through a fish suction pipe 210, and the second end of the fish collection cylinder 200 being connected to a collection device through a fish outlet pipe 220.

[0038] Specifically, refer to Figure 2 After the vacuum pump 260 draws air from the fish collecting tube 200, the internal air pressure of the fish collecting tube 200 decreases. Therefore, seawater and / or catch connected to the fish suction pipe 210 are drawn into the fish collecting tube 200 by atmospheric pressure. After the fish collecting tube 200 is full of catch, air is added to the fish collecting tube 200 through the air supply channel on the fish collecting tube 200. The air supply channel can be connected to the atmosphere or to an air supply device. After adding air, the first air pressure of the fish collecting tube 200 is greater than or equal to the preset air pressure. At this time, the valve of the fish discharge pipe 220 is opened, and the catch is pushed into the fish discharge pipe 220 by gravity and the pressure of the first air pressure, and then reaches the collection device. The vacuum pump 260 is mounted on the base plate 270, and the fish collecting tube 200 is mounted on the base plate 270 by the first support rod 250 and the second support rod 251.

[0039] In some optional embodiments, a support mechanism 280 is provided inside the fish collecting tube 200, and a filter mechanism 290 is provided on the support mechanism 280. The filter mechanism 290 is located between the inlet side and the outlet side of the fish collecting tube 200. The inlet side of the fish collecting tube 200 is connected to the fish suction pipe 210, and the outlet side of the fish collecting tube 200 is connected to the fish outlet pipe 220. A first electromagnetic transceiver is provided inside the fish outlet pipe 220. The filter mechanism 290 includes a first filter screen and a second filter screen. The first filter screen is located above the second filter screen, and the second filter screen is moved by a stepper motor.

[0040] Specifically, refer to Figures 2-3The first electromagnetic transceiver is installed on the inlet side of the fish collection tube 200, and its specific location is not limited. The first electromagnetic transceiver emits a first electromagnetic wave towards the inlet side of the fish collection tube 200. After passing through the fish and seawater flowing in from the inlet side, the first electromagnetic wave is reflected back as a first reflected wave. The first electromagnetic transceiver then generates a second electrical signal, which reflects the absorption rate of the first electromagnetic wave over time. Therefore, the second electrical signal can be used to send a drive signal to move the second filter screen relative to the first filter screen, thus achieving the corresponding seawater filtration. The filtered seawater is discharged into the sea through the discharge pipe 240. The fish suction pipe 210 is equipped with a first valve 211, which allows the fish suction pipe 210 to connect to the aquaculture cage; the fish discharge pipe 220 is equipped with a second valve 221, which allows the fish discharge pipe 220 to connect to the collection device; the air suction pipe 230 between the vacuum pump 260 and the fish collection tube 200 is equipped with a third valve 231, which allows the vacuum pump 260 to connect to the fish collection tube 200; and the discharge pipe 240 at the bottom of the fish collection tube 200 is equipped with a fourth valve 241, which allows the fish collection tube 200 to discharge seawater.

[0041] In some optional embodiments, the first filter screen includes a plurality of uniformly arranged first filter plates 291 and first filter holes, the gaps between adjacent plurality of first filter plates 291 form the first filter holes, and the area of ​​the first filter holes is equal to the area of ​​the first filter plates 291. The second filter screen includes a plurality of uniformly arranged second filter plates 292 and second filter holes, the gaps between adjacent plurality of second filter plates 292 form the second filter holes, and the area of ​​the second filter holes is equal to the area of ​​the second filter plates 292.

[0042] Specifically, refer to Figures 4-6 The first filter plate 291 and the first filter holes are evenly spaced, and the second filter plate 292 and the second filter holes of the second filter screen also have the same structure. By sliding the second filter screen in a preset direction, the second filter plate 292 will move to the first filter hole, and similarly, the first filter plate 291 will simultaneously block the second filter hole. The greater the translation and the higher the overlap, the smaller the gap between the two, and the slower the seawater is filtered. Therefore, by determining the corresponding seawater filtration rate, the target overlap can be obtained, and thus the first distance can be determined. The support mechanism 280 includes a symmetrically arranged first support 281 and second support 282, which support the second filter screen and the first filter screen.

[0043] The implementation of this utility model provides the following beneficial effects: This utility model offers a fish harvesting system for aquaculture cages, comprising a truss module and a cage module. The truss module includes a truss platform and multiple support rods disposed under the truss platform. The cage module includes multiple aquaculture cages, which are positioned between adjacent support rods and slidably connected to the support rods. The truss platform is equipped with a vacuum fish-suction pump and a lifting device for raising and lowering the aquaculture cages. A raised structure is provided at the bottom of each aquaculture cage. By raising and lowering the aquaculture cages using the lifting device, the catch in the cages can be sucked up by the vacuum fish-suction pump. Simultaneously, the raised structure at the bottom of the cages concentrates the catch in the edge area, allowing the vacuum fish-suction pump to harvest all the catch in the edge area. Compared to traditional fish-suction methods, this embodiment effectively improves the catch rate.

[0044] The above is a detailed description of the preferred embodiments of the present utility model. However, the present utility model is not limited to the above embodiments. Those skilled in the art can make various equivalent modifications or substitutions without departing from the spirit of the present utility model. All such equivalent modifications or substitutions are included within the scope defined by the claims of the present utility model.

Claims

1. A fish harvesting system for aquaculture cages, characterized in that, The system includes a truss module and a net cage module. The truss module includes a truss platform and multiple support rods disposed under the truss platform. The net cage module includes multiple aquaculture net cages disposed between adjacent support rods and slidably connected to the support rods. The truss platform is equipped with a vacuum fish suction pump and a lifting device for raising and lowering the aquaculture net cages. The bottom of the aquaculture net cages is provided with a raised structure.

2. The fish harvesting system for aquaculture cages according to claim 1, characterized in that, The lifting device includes a lifting mechanism and a sliding mechanism. The lifting mechanism includes a first rotating motor, a first take-up and release wheel, a first rope, a second rotating motor, a second take-up and release wheel, and a second rope. The sliding mechanism includes a fixed pulley and a third rope. The first net cage and the second net cage are connected by the third rope, which passes around the fixed pulley. The first net cage and the second net cage represent two adjacent aquaculture net cages.

3. The fish harvesting system for aquaculture cages according to claim 2, characterized in that, The first net cage has a first protrusion at its bottom, and the second net cage has a second protrusion at its bottom. Both the first and second protrusions represent the protrusion structure. The first protrusion includes a first telescopic frame, a second telescopic frame, and a third telescopic frame. The first telescopic frame is fixedly connected to the bottom of the first net cage, the second telescopic frame is slidably connected to the inner wall of the first telescopic frame, and the third telescopic frame is slidably connected to the inner wall of the second telescopic frame. The second protrusion includes a fourth telescopic frame, a fifth telescopic frame, and a sixth telescopic frame. The fourth telescopic frame is fixedly connected to the bottom of the second net cage, the fifth telescopic frame is slidably connected to the inner wall of the fourth telescopic frame, and the sixth telescopic frame is slidably connected to the inner wall of the fifth telescopic frame. The first end of the third rope is fixedly connected to the third telescopic frame, and the second end of the third rope is fixedly connected to the sixth telescopic frame.

4. The fish harvesting system for aquaculture cages according to claim 3, characterized in that, The first telescopic frame is provided with a first buckle assembly, which is used to lock the second telescopic frame and the third telescopic frame. The fourth telescopic frame is provided with a second buckle assembly, which is used to lock the fifth telescopic frame and the sixth telescopic frame.

5. The fish harvesting system for aquaculture cages according to claim 1, characterized in that, A fish-attracting light is installed on the support rod, and the fish-attracting light is located at the center of the first position of the support rod.

6. The fish harvesting system for aquaculture cages according to claim 1, characterized in that, The vacuum fish suction pump includes a fish collection cylinder and a vacuum pump. The vacuum pump is connected to the fish collection cylinder. The first end of the fish collection cylinder is connected to the aquaculture net cage through a fish suction pipe, and the second end of the fish collection cylinder is connected to a collection device through a fish outlet pipe.

7. The fish harvesting system for aquaculture cages according to claim 6, characterized in that, The fish collecting tube is equipped with a support mechanism, and a filter mechanism is installed on the support mechanism. The filter mechanism is located between the inlet side and the outlet side of the fish collecting tube. The inlet side of the fish collecting tube is connected to the fish suction pipe, and the outlet side of the fish collecting tube is connected to the fish outlet pipe.

8. The fish harvesting system for aquaculture cages according to claim 7, characterized in that, The fish outlet pipe is equipped with a first electromagnetic transceiver device, and the filtration mechanism includes a first filter screen and a second filter screen. The first filter screen is positioned above the second filter screen, and the second filter screen is moved horizontally by a stepper motor.

9. The fish harvesting system for aquaculture cages according to claim 8, characterized in that, The first filter screen includes a plurality of uniformly arranged first filter plates and first filter holes, and the gaps between adjacent plurality of first filter plates form the first filter holes. The second filter screen includes a plurality of uniformly arranged second filter plates and second filter holes, and the gaps between adjacent plurality of second filter plates form the second filter holes.

10. The fish harvesting system for aquaculture cages according to claim 9, characterized in that, The area of ​​the first filter hole is equal to the area of ​​the first filter plate, and the area of ​​the second filter hole is equal to the area of ​​the second filter plate.

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